<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<style type="text/css">
	div{
	width:100px;
	height:30px;
	background-color:gold !important;
	background-color:silver;
	}
	.c1 { background:blue !important; }
	.c2 { background:green; }
</style>
</head>
<body>
	<div></div>
	<div style="width:100px; height:100px;" class="c1 c2"></div>
</body>
</html>